After enters for the 21st century, as a result of the science and technology large scale development as well as the information sharing degree enhancement, the information industries development progresses by leaps and bounds, the humanity had the space which new hypothesized, the digitized survival moves as well as exchanges. The network took one kind of new medium, has realized the complete significance manifestation compatibility which the present stage people possibly accept. In the daily life, the most direct-viewing expression mood method is through the facial expression observation, the analysis, thus draws the conclusion, because the face is in the human body the richest expression part. Simultaneously any new thing production all has its latent demand inevitability, along with the interactive network medium development, the user must experience the psychology to favor to the vision and the feeling receive culture, the sole writing exchange has been unable to satisfy the modern network user the psychological demand, the animation expression arises at the historic moment. The animation expression production and the development complied with the network user's vision and the entertainment psychology demand develops unceasingly by the vigorous potential. From expression obtaining, the full comparison, the system comb the network medium animation expression in the interactive way characteristic, discovers its law of development, thus provides the more solid rationale for the interactive animation expression on the network medium creation and the more reasonable reality instruction. Key